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习题练习:Impulse and momentum



 作者: admin发布日期: 2024-08-07 16:03   总分: 17分  得分: _____________

答题人: 游客未登录  开始时间: 24年08月07日 15:54  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  94.16: A car of mass m, traveling at speed v, stops in tctmg ;wiuo5 e/b;esz/+ da5; lime t when maximum braking force is datg+uzbel/;;e is ; 5/co5mwapplied. Assuming the braking force is independent of mass, what time would be required to stop a car of mass 2m traveling at speed v?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.04: When the velocity of a moving object is doubled, its_______is also doubvkln5cp 0c0k1lel0k0pnc k1 5vcd.

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.06: Impulse, Fnebpc st x ps76:2+k:bmot $\Delta$tis best related to:

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.05: Which one of the following choices is most closs 6 mr/86r:*w,m;om mb; yz utze1iwzyely associated with the following observation about an1wibm:6 ymzr6z ;sz*8r;yomu emtw/, isolated object: “The linear momentum of the object is constant.”?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.21: The change in linear momentum of an object is always in the same di4v4vnkhtd w1q22po g /rectiogd q pnkvhv4/42to2w 1n as the

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.08: How long must a 100 N net force a;iiu0p 7a*4gqp ci h0/1 ydtkhct to produce a change in momentum of 200 kg.m/stiigpq*icu/4kh; 1h 7dapy0 0 ?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.29: P and Q have the same momentum. Q can ijfo 8p/p6v7* ex.qdzhave more kinetic energy than P if it:j*dv7/ x if.oeqz6pp8

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  98.26: A ball with a mass of 0.50 kg and a speed of 6.0 m/s c y.. 8zcqi)yhsollides perpendicularly with a wall and bounces off with a speed of 4.0 m/s in the opposite direction. ) cqys.hy.z8i What is the magnitude of the impulse acting on the ball?

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.08: A 50 kilogram gymnast falls freely from a height of 4 meters on to a tkoc/f4 e.gl 2meek dc5q 71s,b qqrm3/rampoline. The trampoline then bounces her back upward3qfecc l.e q7mk5 eg2dk m o4,1srq/b/ with a speed equal to the speed at which she first struck the trampoline. What is the average force the trampoline applies on the gymnast?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.27: A 2.0 kg mass moves at 10.0 m/s when itv (ytjnq,(k 7vmr03bw has a collision in space. The mass’s speed was unchanged, but the direction n( 7v(03bytqw,rm vkjof its velocity was altered by $80^{\circ}$. If the collision lasted 0.25 s, what was the magnitude of the average force exerted on the mass?



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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.13: A bat striking a 0.125 kg-baseball is in contact with the c dow3 djt,d 0ogl06o:xxblrk+ 1b)h7 ball for a time of 0.03 seconds. The ball travels in a straight line as it approaches and then leaves the bat. If the ball arrives at the bat with a velocity of 4.5 m/s and leaves with a velocity of-6.5 m/s, what is the magnitude of the average force w:x 0t )db71 cgj 6h3dlr l0x,boo+kdoacting on the ball?

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.43: An object of mass 4.0 g has atotal kinetic energy of 100.0 J and an x-cmo;(gxxq) +c zuxhj26omponent ofz)c 6 2 ;jguxmx+hoqx( linear momentum equal to 24.0 kg.m/s. The object is moving in the x-y plane. What is they-component of the object’s linear momentum?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.05: At an instant of time t, a point object of mass M moves with velc*xyfn oer r(w/ 9)o4aocity V, has acceleration a, and is at position (x,y). In what direction must the linear momentum of the objectro49e)a r*yxco n w(/f be directed at this instant?

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.32: A rubber ball of mass 2.0 kg falling straight doll* -bb+t p0 lbijcx*9tkjmnx*8)f ;xwnward hits the ground with a speed of 0.90 m/s* pbf tj*m+llb t -x kc9ib;ln*8x0)jx and then rebounds straight upward with a speed of 0.60 m/s. The collision time of the ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average acceleration (in units of $m/s^{2}$ ) of the ball while it is in contact with the ground?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.33: A rubber ball of mass 2.0 kg falling straight downward hits the groun5tx4r/(pl c,fxs xq d/d with a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 m/s. The collision time of the ball with the ground icp/xx4 rl,d/ f(tsxq5s 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average force (in units of Newtons) exerted by the ground on the ball while they are in contact?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  14.12: A box of mass 5.0 kg is beingn, j m(4imnqf1 pushed to the right across a horizontal surface while a constant frictional force of 8.0 N acts on the box. At some instant of time, the box has a speed of 4.0 m/s and an 1(n jnm ,fmiq4acceleration of$3.0\; m/s^{2}$ . What is the magnitude of the net force acting on the box at this instant?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.12: A box of mass 12.0 kg is being pushed cw9 g;*fx0uvmto the right across a horizontal surface. When the box has 12.0 J of kinetic energy, a 12.0 N net force acts on it. Which one of the following choices best represents the magnitude of the linear momentum of the box at this in fwcv09*x;gumstant?

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